1. Yolk–shell structured Bi2SiO5:Yb3+,Ln3+ (Ln = Er, Ho, Tm) upconversion nanophosphors for optical thermometry and solid-state lighting.
- Author
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Chen, Dongxun, Zhang, Liangliang, Liang, Yanjie, Wang, Weili, Yan, Shao, Bi, Jianqiang, and Sun, Kangning
- Subjects
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ERBIUM , *YTTERBIUM , *PHOTON upconversion , *X-ray powder diffraction , *OPTOELECTRONIC devices , *THERMOMETRY , *SEMICONDUCTOR lasers - Abstract
Yolk–shell structured Bi2SiO5:Yb3+,Er3+ upconversion nanophosphors have been successfully synthesized via a simple template-assisted route, in which the reaction of Yb3+/Er3+ co-doped bismuth precursor nanospheres with the silica capping layer in situ is ingeniously designed and controlled. The phase transition and morphology evolution are investigated in detail by X-ray powder diffraction and high-resolution electron microscopy to propose the formation mechanism of the yolk–shell nanostructure. The yielded Bi2SiO5:Yb3+,Er3+ nanophosphors can emit bright green upconversion luminescence under the excitation of a 980 nm laser diode, which enables them to be promising emitters for optoelectronic devices. The potential of the Bi2SiO5:Yb3+,Er3+ nanophosphors as an optical nanothermometer is also demonstrated. The proposed facile synthetic route, unique yolk–shell nanostructure and good upconversion luminescence performance lead the way to access these lanthanide-doped Bi2SiO5 nanophosphors for applications in biotechnology and optoelectronic devices. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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